Honestly, the harder classes that I'm in are intermediate microeconomics.

老实说，我现在上的更难的课程是中级微观经济学。

youdao

According to one Canadian survey, after 12 years of daily French classes, only one high school graduate out of 147 (0.68%) achieved "intermediate" proficiency.

根据加拿大的一项调查，在上了12年日常法语课后，147所高中里只有1所高中(0.68%)的毕业生可以达到“中等”流利程度。

youdao

The courses include elementary, intermediate and advanced Chinese, conversational Chinese, business Chinese and children class for a total number of 21 classes.

孔子学院开设有初级、中级、高级、提高、商务、儿童班等各种汉语培训课程，共有21个班级。

youdao

Honestly the harder classes that I'm in is... I'm in intermediate micro,

老实说，现在学习的比较难的课程是……中级微观经济学，

想学习宗教学 - SpeakingMax英语口语达人

You can sort classes by skill level (beginner, intermediate or advanced) and by trainer specialty (like brides-to-be, postnatal, exercise novices or elite athletes).

WSJ: The Digital Solution: Working Out With a Trainer and Friends via Webcam